High Quality of Hot-Dip Gavalnized Steel Coil

High Quality of Hot-Dip Gavalnized Steel Coil System 1

High Quality of Hot-Dip Gavalnized Steel Coil

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 50 m.t.

Supply Capability:: 10000 m.t./month

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Hot-dip Zinc Coating Steel Building Roof Walls
1.Structure of Hot-Dip Galvanized Steel Sheet Description：

Hot-dip galvanized steel coils are available with a pure zinc coating through the hot-dip galvanizing process. It offers the economy, strength and formability of steel combined with the corrosion resistance of zinc. The hot-dip process is the process by which steel gets coated in layers of zinc to protect against rust. It is especially useful for countless outdoor and industrial applications. Production of cold formed corrugated sheets and profiles for roofing, cladding, decking, tiles, sandwich walls, rainwater protective systems, air conditioning duct as well as electrical appliances and engineering.

2.Main Features of the Hot-Dip Galvanized Steel Sheet：

• Excellent process capability

• Smooth and flat surface

• Workability, durability

• Excellent anticorrosive property

• High strength

• Good formability

• Good visual effect

3.Hot-Dip Galvanized Steel Sheet Images:

High Quality of Hot-Dip Gavalnized Steel Coil

4.Hot-Dip Galvanized Steel Sheet Specification：

Standard: ASTM, JIS,EN

Grade: CS, DX51D+Z,SGCC, SS 230~550,S220GD+Z~S550GD+Z, SGC340~SGC570

Thickness: 0.1mm~5mm

Width: max 2000mm

Coil weight:3-12 MT

Coil ID:508/610mm

Surface structure: zero spangle, regular spangle or minimum spangle

Surface treatment: Chromate treatment, Oiled/dry, skinpassed/non-skinpassed

Packing: Standard seaworthy export package

Technology test results:

High Quality of Hot-Dip Gavalnized Steel Coil

5.FAQ of Hot-Dip Galvanized Steel Sheet：

We have organized several common questions for our clients，may help you sincerely：

1.How about your company？

A world class manufacturer & supplier of castings forging in carbon steel and alloy steel，is one of the large-scale professional investment casting production bases in China,consisting of both casting foundry forging and machining factory. Annually more than 8000 tons Precision casting and forging parts are exported to markets in Europe,America and Japan. OEM casting and forging service available according to customer’s requirements.

2.How to guarantee the quality of the products？

We have established the international advanced quality management system，every link from raw material to final product we have strict quality test；We resolutely put an end to unqualified products flowing into the market. At the same time, we will provide necessary follow-up service assurance.

3. How long can we receive the product after purchase?

Usually within thirty working days after receiving buyer’s advance payment or LC. We will arrange the factory manufacturing as soon as possible. The cargo readiness usually takes 15-30 days, but the shipment will depend on the vessel situation.

Q: Well the other day i told my friend that when you put a compass near steel it will screw up and he said only magnets do that then i showed him and it worked then he said: that'ss because steel has its own magnet in it coz it builds up static electricity is that correct what he said? thanks: No. Steel does not build up static electricity by itself. Also, magnetic fields are made by moving electricity, not static electicity. The steel conducts magnetism, so it changes the earth's magnetic field near itself by conducting the field through itself. The larger effect is a magnet near a piece of steel: the compass has a magnet, and when you place it near a ferromagnetic material, it attracts. Try putting a refridgerator magnet against the fridge - it sticks because it attracts.

Q: Can steel coils be welded?: Yes, steel coils can be welded. Welding is a widely used process for joining metal components, including steel coils.

Q: How are steel coils used in the production of steel clips?: Steel coils are used in the production of steel clips by being unwound and fed into a machine, where they are cut, shaped, and formed into the desired clip design.

Q: I'm trying to put together a small structure using galvanized steel electrical conduit (3/4) and I can't seem to find a T-junction conduit coupler anywhere. I'm wondering if I could weld the tubing together, but I'm not sure if I can weld galvanized steel. Also, if I can weld them, is there any special technique that I need to use outside of regular acetelene/oxygen torch and solder?: Conduit is made from low carbon steel. Then the galvanized coating is applied. The fumes from the coating are poisonous when heated. So your choices are to remove the coating then do your heating. They can be soldered, brazed and welded. It all depends how strong you want the joint and how high a temperature used. If you use silver solder the joint must be very tight. If you use lead solder a flux must be used same as brazing. Welding is the strongest and the melting temperature of steel is about 2600 degrees.

Q: How are steel coils processed for different levels of hardness?: Steel coils can be processed to achieve different levels of hardness through a variety of methods. One common method is heat treatment, which involves heating the coils to a specific temperature and then rapidly cooling them to alter their microstructure and achieve the desired hardness. The process of heat treatment can include quenching, tempering, or annealing, depending on the desired hardness level. Quenching involves cooling the coils rapidly in a liquid medium such as water or oil to achieve a high hardness level. Tempering, on the other hand, involves reheating the coils to a lower temperature and then slowly cooling them to achieve a desired balance of hardness and toughness. Annealing is a process that involves heating the coils to a specific temperature and then slowly cooling them to relieve internal stresses and achieve a softer and more ductile material. Additionally, mechanical processes such as cold rolling or cold working can also be used to increase the hardness of steel coils. These processes involve subjecting the coils to compressive forces, which cause the material to deform and result in an increase in hardness. Overall, the processing of steel coils for different levels of hardness requires careful control of temperature, cooling rate, and mechanical forces to achieve the desired properties for specific applications.

Q: What are the different methods of steel coil surface cleaning?: Some of the different methods of steel coil surface cleaning include pickling, shot blasting, and chemical cleaning. Pickling involves immersing the steel coil in an acid solution to remove oxides and scales. Shot blasting uses high-speed particles to remove rust, scale, and paint from the surface. Chemical cleaning involves using specialty chemicals to dissolve contaminants and restore the steel coil's surface.

Q: Can steel coils be coated with light-reflective materials?: Yes, steel coils can be coated with light-reflective materials.

Q: How are steel coils inspected?: Steel coils are inspected through various methods such as visual inspection, dimensional measurement, and non-destructive testing techniques. Visual inspection involves the examination of the coils for any surface defects, such as scratches, dents, or rust. Dimensional measurement ensures that the coils meet the required specifications in terms of thickness, width, and diameter. Non-destructive testing techniques like ultrasonic testing, magnetic particle inspection, and eddy current testing are used to detect any internal defects or discontinuities in the steel coils without causing any damage to the material. These comprehensive inspection methods ensure the quality and integrity of steel coils before they are used in various industries.

Q: Steels like YHB-2, MVS-8, and SK-5. Also if you know anything about these steels that would be helpful.: White steel is a common shorthand name for white paper steel (shirogami hagane) which can be any of several fairly simple high carbon, water hardening steel grades. The carbon content varies by grade, and runs from 0.8 to 1.4%. The range of carbon content within a grade is a tight 0.1%. For example, the carbon content of Shirogami Hagani No1A is specified to be between 1.3 and 1.4%. Each grade also contains 0.1-0.2% silicon and 0.2-0.3% manganese, and only trace amounts of the impurities sulfur and phosphorus. Blue paper steel (aogami hagane) is also offered in several grades, with carbon content ranging similarly to the white grades. However, blue steel contains the additional alloying elements chromium and tungsten, and one grade (aogami super) also contains molybdenum and vanadium. The blue steels can be quenched in water or oil, whereas most of the white grades need a faster quench and require water.

Q: How are steel coils inspected for yield strength?: Yield strength inspection of steel coils involves a series of testing methods. The most commonly used method is the tensile test, where a small sample is taken from the coil and subjected to a controlled load until it reaches its yield point. In the tensile test, the sample is progressively stretched until it deforms and ultimately fractures. Throughout this process, the load and elongation data are continuously recorded. The yield strength is then determined by pinpointing the point on the stress-strain curve where the material starts showing plastic deformation or permanent elongation. Another approach to inspecting steel coils for yield strength is the hardness test. Since hardness is often linked to yield strength, a hardness test can estimate the material's yield strength. This test involves measuring the steel coil's surface resistance to indentation or penetration using instruments like a Rockwell or Brinell hardness tester. Moreover, non-destructive testing methods like ultrasonic testing and magnetic particle inspection can also be utilized to assess yield strength. Ultrasonic testing employs high-frequency sound waves to detect any internal defects or inconsistencies in the material's structure. On the other hand, magnetic particle inspection relies on the application of magnetic fields and the usage of magnetic particles to identify surface cracks or defects. In conclusion, there are various testing methods available to inspect steel coils for yield strength. These methods offer valuable information to manufacturers and inspectors regarding the steel's quality and performance capabilities, ensuring that it meets the required standards and specifications.

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